JPH0222653A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent the generation of exposure unevenness, etc., by cutting out the influence to exposure from change in the motor speed factor by pressure phenomena, etc., by providing a first driving member for traveling the photosensitive and pressure sensitive recording medium in the exposure means, and a second driving member for rotating a roller in a developing means. CONSTITUTION:The driving means 50 is provided with the motor A51 corresponding to the first driving member, and the motor B52 corresponding to the second driving member. When a developing paper is nipped by a pressure developing device and the pressure phenomena is started, a great torque change generates, sometimes causing a speed change in the motor B52, but because the exposure system is fed by the motor A51, exposure can be carried out without generating exposure unevenness. Further, the speed difference of the micro capsule paper is absorbed by the traveling of a tension roller.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image forming apparatus using a photosensitive pressure sensitive recording medium.

[Prior art] Conventionally, a roll-shaped photosensitive and pressure-sensitive recording medium is conveyed by
The pressure development section, heat fixing section, etc. were driven by the same motor, and the pressure development etc. were progressed at the same time while further performing exposure.

[Problems to be Solved by the Invention] However, in general, load fluctuations on a rotating shaft are large in pressure development, winding of a photosensitive pressure sensitive recording medium, etc., and speed fluctuations occur even if speed control is performed. As a result, speed fluctuations occur even in the exposure sections driven by the same motor, causing exposure blur, uneven exposure, and the like.

Generally, image forming apparatuses are required to have high image quality, and it is necessary to maintain a uniform feeding speed of the exposure section, but it has been difficult to eliminate motor speed fluctuations due to the pressure developing section and the like.

The present invention has been made to solve the above-mentioned problems, and it is possible to create beautiful images by transporting a photosensitive pressure-sensitive recording medium in an exposure section smoothly and at a constant speed. The purpose is to provide a forming device.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an exposure means that exposes a moving light-sensitive and pressure-sensitive recording medium by irradiating light from an original through an optical system, and a developing means for developing the light-sensitive pressure-sensitive recording medium by passing the light-sensitive pressure-sensitive recording medium exposed by the exposure means between the pair of rollers, and at least the exposure means; In the image forming apparatus, the image forming apparatus has a drive means for moving the photosensitive pressure sensitive recording medium and the document in the image forming apparatus and rotating a roller in the developing means, and is capable of performing the next exposure at the same time as the development, wherein the driving means includes at least the exposure means. The gist of the present invention is to include a first driving member for moving the photosensitive and pressure-sensitive recording medium, and a second driving member for rotating at least a roller in the developing means.

[Function] In the image forming apparatus of the present invention having the above configuration, the photosensitive pressure sensitive recording medium is driven and moved by the first driving member, and is exposed to light by the exposure means. The exposed light-sensitive and pressure-sensitive recording medium is passed between a pair of rollers that are driven and rotated by a second driving member, and is developed.

At this time, the influence of load fluctuations on the roller portion affects only the second drive member, and does not affect the first drive member.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings. FIG. 2 is a schematic sectional view of a photosensitive and pressure sensitive copying machine that is capable of full color copying.

The photosensitive paper (consisting of microcapsule paper corresponding to the microcapsule sheet and color developer paper corresponding to the color developer sheet) that enables such copying is disclosed in Japanese Patent Application Laid-Open No. 58-8873.
This has been proposed in Publication No. 9, etc., and will not be described in detail here.

As shown in the figure, the photosensitive and pressure-sensitive copying machine 40 is composed of a document table glass 2 and a document table cover 1, the top plate of which is movable in the horizontal direction.A desired document is placed face down on the document table glass 2. Can be placed in any condition. A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the document table glass 2 and a semi-cylindrical reflecting mirror 4 arranged to surround it is fixed to the upper right side of the copying machine 40. Light is irradiated in a line toward the document table glass 2.

Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction. The light emitted from the light source passes through the transparent glass 2 and is reflected by the original placed on it, but the upper surface of the original platen glass 2 is covered to prevent this irradiated light from leaking from areas other than the original. A document table cover 1 is provided.

In addition, in order to use the light emitted from the halogen lamp 3 to irradiate the original with high efficiency, a beam flap 5 is arranged to the left of the light source, and reflects the light that is not directed directly toward the original and uses it again to irradiate the original. .

A fan 6 and a louver 7 are provided to the right of the halogen lamp to introduce air from the outside. As a result, air can be efficiently applied to the document table glass 2. Light emitted from the halogen lamp 3 and reflected from the original placed on the original table glass 2 passes through a filter 8 and a lens 9 as exposure means.

The filter 8 is used to change the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjust the color tone of the copied image. The lens 9 is attached to a lens mounting plate 10, and allows minute angle adjustment with respect to the optical path. The light focused by the lens 9 is reflected by two reflecting mirrors 11.
80@The direction is changed and an image is formed on the microcapsule paper 37 that is closely positioned below the exposure table 19. The two reflecting mirrors 11 are fixed to the mirror mounting plate 12, and the optical path length can be adjusted.
The focus is adjusted by finely adjusting the mounting position of the mirror mounting plate 12.

On the other hand, a long microcapsule paper 37 is wound around a cartridge shaft 14 and housed in a removable cartridge 13 placed below the document table glass 2. and the pressure developing device 20 before reaching the winding shaft 25.

That is, the microcapsule paper 37 that has come out from the lower part of the cartridge 13 is guided by the feed roller 15 and tie roller 17, passes below the exposure table 19, passes through the feed roller 41 and the tension roller 42, and then is transferred to the pressure developing device 20. is supplied to The tension roller 42 is fixed to the main body by a tension spring 43. Thereafter, the microcapsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding shaft 25. The unexposed microcapsule paper 37 after leaving the cartridge 13 is maintained in an unexposed state by the light shielding cover 16.

The transport speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22, and is made to substantially match the moving speed of the document table glass 2, so that the transport speed of the microcapsule paper 37 when passing through the exposure table 19 is controlled to be constant. A latent image of a predetermined line of the document is sequentially formed on the document.

Further, a color developer paper cassette 32 containing cut paper type developer paper 38 is provided below the pressure developing device 20, and the developer paper 38 is taken out one by one by a half-moon roller 33 and transferred to the developer paper roller 34 and the resist. After the leading end is aligned by the gate 35, the paper is transported to the paper entrance of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 37.
The color developer paper 38 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 2o is composed of a small diameter roller 21 and a backup roller 31. Microcapsule paper 37
The microcapsule surface on which the latent image is formed and the developer-coated surface of the color developer paper 38 are in contact with each other on the inside, and are sandwiched between the small diameter roller 21 and the backup roller 31 and pressure is applied. This pressure destroys the unexposed microcapsules and forms an image on the developer paper 38.

The microcapsule paper 37 and the color developer paper 38 that have come out of the pressure developing device are conveyed by the capsule paper feed roller 22, and the microcapsule paper is moved upward by the peeling roller 23, and the color developer paper 3 is transported by the peeling roller 23.
8 are orthogonally separated.

After color development is promoted by the heat fixing device and an image is formed on the color developer paper 38, the paper is conveyed to the paper discharge tray 27 with the image side facing up. The heat fixing device is composed of a hollow heat roller 29 having a heater 30 inside and a color developing paper feed roller 28.

The separated microcapsule paper passes through a meandering adjustment roller 24 and is wound around a winding shaft 25.

Further, the driving means 5o in this embodiment includes a motor A51 corresponding to the first driving member and a second driving member, as shown in FIG.
It is composed of a motor B52 corresponding to a driving member.

The rotation shaft of the motor A51 is connected to a first power transmission mechanism 53 for moving the document table glass 2 and a capsule paper feed roller 4.
1. It is connected to a second power transmission mechanism 54 for rotating the feed roller 15 and tie roller 17. Further, the rotation shaft of the motor B52 is a third rotary shaft that rotates the small diameter roller 21.
It is connected to a power transmission mechanism 55, a fourth power transmission mechanism 56 that rotates the winding shaft 25, and a fifth power transmission 57 that drives other members.

The operation of the apparatus configured as described above will be explained below.

Now, after opening the document platen cover 1 and placing the original on the document platen glass 2, if you press the start button (not shown), the document platen glass 2 will first move to the right in FIG. , the document platen glass 2 stops at a position where the left end faces the light source. Thereafter, with the halogen lamp 3 turned on, the document table glass 2 is moved to the left. The light emitted from the halogen lamp 3 is reflected by the original, and then reflected by the filter 8, lens 9, and two reflection mirrors 11, and is then reflected by the microcapsule paper 37 located below the exposure table 19.
imaged on top. At this time, the microcapsule paper 37 is moved to the left on the exposure table 19 at the same speed as the moving speed of the document table glass 2, so the microcapsule paper 37
An image on the original document is formed as a latent image on 7.

As the platen glass 2 moves to the left, the half-moon roller 33 takes out the developer paper 38 from the developer paper cassette 32 and puts it in the pressure developing device 20 in a state where it is superimposed on the already exposed microcapsule paper 37. The latent image on the microcapsule paper 37 is developed and the color development paper 3
8.

At this time, when the developer paper 38 is nipped in the pressure developing device 20 and pressure development is started, a large torque fluctuation occurs, and the speed of the motor B52 may change. In this case, uneven feeding of the microcapsule paper 37 occurs in the developing system, but since the exposure system is fed by the motor A51, exposure can be performed without uneven exposure. Furthermore, the difference in speed of the microcapsule paper 37 is absorbed by the movement of the position of the tension roller 42. After that, the developer paper 38
After being thermally fixed by the thermal fixing device, the image is discharged outside the copying machine 40. On the other hand, the microcapsule paper 37 that has passed through the pressure developing device 20 is sequentially wound around the winding shaft 25. When the document platen glass 2 finishes moving to a position where its right end faces the light source, copying of the document is completed and the halogen lamp 3 is turned off.

The present invention is not limited to the embodiments detailed above, and various changes can be made without departing from the spirit thereof.

For example, in this embodiment, the feed roller 15, the tie roller 1
7 and the capsule paper feed roller 41 were driven by the motor A51, but the capsule paper feed roller 41 and the document platen glass 2
may be driven. Further, in this embodiment, the tension roller is brought into contact with the capsule-carrying surface of the microcapsule paper due to the arrangement of components within the machine, but unnecessary destruction of the microcapsules can be prevented by bringing the tension roller into contact from the back side.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, it is possible to cut the influence of motor speed fluctuation factors due to pressure development etc. on exposure, thereby preventing the occurrence of exposure unevenness etc. Exposure can be carried out without any problems.

[Brief explanation of the drawing]

1 and 2 show an embodiment embodying the present invention. FIG. 1 is a block diagram for explaining the structure of the drive means of the photosensitive pressure-sensitive copying machine of this embodiment, and FIG. The figure is a schematic cross-sectional view of the present light- and pressure-sensitive copying machine. In the figure, 8 is a filter, 9 is a lens, 20 is a pressure developing device, 21 is a small diameter roller, 25 is a winding shaft, 31 is a backup roller, 37 is a microcapsule paper, 38 is a color developer paper, 50 is a driving means, 51 Motor A152 is motor B.

Claims (1)

[Claims] 1. An exposure device that exposes a moving photosensitive and pressure sensitive recording medium by irradiating light from an original through an optical system, and a pair of rollers that rotate while pressing each other; a developing means for developing the light-sensitive pressure-sensitive recording medium by passing the light-sensitive pressure-sensitive recording medium exposed by the exposure means between a pair of rollers; at least the movement of the light-sensitive pressure-sensitive recording medium in the exposure means and the developing means; and a driving means for rotating a roller in the image forming apparatus, which is capable of performing subsequent exposure at the same time as development, wherein the driving means is configured to at least move the photosensitive and pressure-sensitive recording medium in the exposing means. An image forming apparatus comprising: a first driving member; and a second driving member that rotates at least a roller in a developing means. 2. In the image forming apparatus according to claim 1, a microcapsule sheet on which a latent image is formed by exposure, and a color developer on which a developed image is formed by stacking and pressing the microcapsule sheet on which the latent image is formed. An image forming apparatus characterized in that it handles a photosensitive and pressure sensitive recording medium consisting of a sheet. 3. The image forming apparatus according to claim 2, further comprising a spool for winding up the microcapsule sheet after exposure and development, and the second driving member also rotates the spool. Forming device.